This patch contains a PCIe root complex driver for Broadcom Northstar2 arm64 SoC.
Internal and external PCIe (PAXC and PAXB) are supported in RC mode.
Changes after internal review:
- Remove structures for unsupported PAXB/PAXC V2 revisions - they won't be probed
- Derive from ofw_pci_driver instead of exporting its methods
- Make explicit apb_err_disable/enable functions
- Simplify some code